:root {
  --primary: #E11D48;
  --secondary: #1E293B;
  --accent: #FBBF24;
  --bg-dark: #0F172A;
  --bg-light: rgba(255, 255, 255, 0.04);
  --bg-card: rgba(255, 255, 255, 0.03);
  --text-main: #F8FAFC;
  --text-muted: #64748B;
  --border-color: rgba(225, 29, 72, 0.22);
  --primary-light: #FB7185;
  --accent-light: #FCD34D;
  --primary-glow: rgba(225, 29, 72, 0.45);
  --accent-glow: rgba(251, 191, 36, 0.4);
  --text-invert: #ffffff;
  --text-dark: #0F172A;
  --bg-gradient-end: #1E293B;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: "Rajdhani", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: 0.04em;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 0.4rem;
  object-fit: cover;
  border: 1px solid var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
}

.nav-links {
  display: none;
  gap: 1.6rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: color 0.2s, text-shadow 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  text-shadow: 0 0 10px var(--accent-glow);
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--primary);
  border-radius: 0.4rem;
  color: var(--text-main);
  cursor: pointer;
  font-size: 1.2rem;
}

.mobile-menu {
  display: none;
  padding: 0.5rem 0 1rem;
  border-top: 1px solid var(--border-color);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 0.85rem 0;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-weight: 700;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
  .mobile-menu {
    display: none !important;
  }
}

.hero {
  position: relative;
  min-height: calc(100svh - 68px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 25% 25%, rgba(225, 29, 72, 0.28), transparent 50%),
    radial-gradient(ellipse at 80% 75%, rgba(251, 191, 36, 0.16), transparent 50%),
    linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-gradient-end) 100%);
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(225, 29, 72, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(225, 29, 72, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 3rem 0;
  text-align: center;
}

.hero-logo {
  width: clamp(120px, 28vw, 220px);
  margin: 0 auto 1.5rem;
  border-radius: 1rem;
  box-shadow: 0 0 50px var(--primary-glow);
  border: 2px solid var(--primary);
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.1;
  margin: 0 0 1rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .subtitle {
  font-size: clamp(1rem, 2.4vw, 1.3rem);
  color: var(--text-muted);
  margin: 0 auto 2.2rem;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.9rem;
  border-radius: 0.5rem;
  font-weight: 800;
  font-size: 1rem;
  transition: all 0.28s ease;
  cursor: pointer;
  border: none;
  letter-spacing: 0.04em;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #be123c);
  color: var(--text-invert);
  box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px var(--primary);
}

.btn-gold {
  background: linear-gradient(135deg, var(--accent), #d97706);
  color: var(--text-dark);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-gold:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
}

.btn-ghost:hover {
  background: rgba(225, 29, 72, 0.12);
  box-shadow: 0 0 24px var(--primary);
}

.btn-block {
  width: 100%;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  transition: all 0.28s ease;
  backdrop-filter: blur(8px);
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 12px 36px var(--primary-glow);
}

.card-flat {
  background: rgba(225, 29, 72, 0.05);
  border: 1px solid rgba(225, 29, 72, 0.18);
  border-radius: 0.75rem;
  padding: 1.5rem;
  transition: all 0.28s ease;
}

.card-flat:hover {
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--accent-glow);
}

.card-bordered {
  background: var(--bg-card);
  border-top: 3px solid var(--accent);
  border-radius: 0.5rem;
  padding: 1.5rem;
  transition: all 0.28s ease;
}

.card-bordered:hover {
  transform: scale(1.03);
  box-shadow: 0 0 30px var(--accent-glow);
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.5), transparent);
}

.section-title {
  font-size: clamp(1.7rem, 4.4vw, 2.6rem);
  font-weight: 900;
  margin: 0 0 0.85rem;
  display: inline-block;
  letter-spacing: 0.04em;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 0.75rem;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  box-shadow: 0 0 12px var(--primary);
}

.section-title-bar {
  border-left: 5px solid var(--accent);
  padding-left: 1rem;
  font-size: clamp(1.7rem, 4.4vw, 2.6rem);
  font-weight: 900;
  margin: 0 0 0.85rem;
  letter-spacing: 0.04em;
}

.section-title-bar::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
  margin-right: 0.6rem;
  vertical-align: middle;
  box-shadow: 0 0 12px var(--primary);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 2.5rem;
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.badge-primary {
  background: rgba(225, 29, 72, 0.12);
  border-color: var(--primary);
  color: var(--primary-light);
}

.icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #be123c);
  color: var(--text-invert);
  font-size: 1.5rem;
  box-shadow: 0 0 24px var(--primary-glow);
  margin-bottom: 1rem;
}

.icon-square {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 0.5rem;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.friend-link {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.35rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.22s;
}

.friend-link:hover {
  background: rgba(225, 29, 72, 0.12);
  border-color: var(--primary);
  color: var(--accent);
  box-shadow: 0 0 14px var(--primary-glow);
}

.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border-color);
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.4));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.qr-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  padding: 1rem;
  text-align: center;
  transition: all 0.25s;
}

.qr-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.qr-card img {
  width: 110px;
  height: 110px;
  object-fit: cover;
  margin: 0 auto 0.6rem;
  border-radius: 0.4rem;
}

.qr-card .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.code-box {
  background: var(--bg-card);
  border: 1px dashed var(--primary);
  border-radius: 0.6rem;
  padding: 1.25rem;
  transition: all 0.25s;
}

.code-box:hover {
  border-style: solid;
  box-shadow: 0 0 24px var(--primary-glow);
}

.code-value {
  font-family: "Courier New", monospace;
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-shadow: 0 0 12px var(--accent-glow);
}

.guide-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .guide-layout {
    grid-template-columns: 240px 1fr;
  }
}

.guide-toc {
  position: sticky;
  top: 90px;
  align-self: start;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  padding: 1.25rem;
}

.guide-toc a {
  display: block;
  padding: 0.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: color 0.2s;
}

.guide-toc a:hover {
  color: var(--accent);
}

.article-body {
  font-size: 1.02rem;
  line-height: 1.85;
}

.article-body p {
  margin: 0 0 1.1rem;
  color: var(--text-main);
}

.article-body h2 {
  font-size: clamp(1.4rem, 3.5vw, 1.85rem);
  font-weight: 900;
  margin: 2rem 0 1rem;
  color: var(--accent);
  padding-left: 0.85rem;
  border-left: 4px solid var(--primary);
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 1.5rem 0 0.85rem;
  color: var(--primary-light);
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.25rem;
  padding-left: 1.4rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: rgba(225, 29, 72, 0.08);
  border-left: 4px solid var(--primary);
  border-radius: 0.4rem;
  color: var(--text-main);
}

.news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .news-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 0 28px var(--accent-glow);
}

.news-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-card .news-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin: 0 0 0.6rem;
  color: var(--text-main);
}

.news-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 0.85rem;
  flex: 1;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
}

.flow-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  position: relative;
  transition: all 0.28s;
}

.flow-card .step {
  position: absolute;
  top: -14px;
  left: 1.25rem;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), #be123c);
  color: var(--text-invert);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  box-shadow: 0 0 18px var(--primary-glow);
}

.flow-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .feature-row {
    grid-template-columns: 1fr 1fr;
  }
  .feature-row.reverse {
    direction: rtl;
  }
  .feature-row.reverse > * {
    direction: ltr;
  }
}

.feature-row img {
  border-radius: 0.85rem;
  border: 1px solid var(--border-color);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.school-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .school-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.school-card {
  background: linear-gradient(180deg, rgba(225, 29, 72, 0.08), rgba(30, 41, 59, 0.4));
  border: 1px solid var(--border-color);
  border-radius: 0.85rem;
  padding: 1.75rem 1.5rem;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.school-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.school-card:hover {
  transform: translateY(-8px) rotate(-1deg);
  border-color: var(--accent);
  box-shadow: 0 16px 40px var(--primary-glow);
}

.school-card .school-name {
  font-size: 1.5rem;
  font-weight: 900;
  margin: 0 0 0.4rem;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.school-card .school-tag {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.school-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.school-card ul li {
  padding: 0.4rem 0 0.4rem 1.4rem;
  position: relative;
  color: var(--text-main);
  font-size: 0.95rem;
}

.school-card ul li::before {
  content: "\f00c";
  font-family: "FontAwesome";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.download-hero {
  background: radial-gradient(ellipse at center, rgba(225, 29, 72, 0.18), transparent 60%);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.code-input-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  max-width: 540px;
  margin: 1.5rem auto 0;
}

.code-input {
  flex: 1;
  min-width: 200px;
  padding: 0.85rem 1rem;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  color: var(--text-main);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.code-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 14px var(--accent-glow);
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  margin: 3rem 0;
}

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.bg-dark { background-color: var(--bg-dark); }
.glow-primary { box-shadow: 0 0 24px var(--primary-glow); }
.glow-accent { box-shadow: 0 0 24px var(--accent-glow); }